package network;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.ServerSocket;

import java.net.Socket;
import java.util.Scanner;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class TcpThreadPool {
    private ServerSocket listenSocket = null;
    public TcpThreadPool(int port) throws IOException {
        listenSocket = new ServerSocket(port);
    }
    public void start() throws IOException {
        System.out.println("服务器启动！");
        ExecutorService pool = Executors.newCachedThreadPool();
        while(true){
            Socket clientSocket = listenSocket.accept();
            pool.submit(new Runnable() {
                @Override
                public void run() {
                    processConnection(clientSocket);
                }
            });
        }
    }
    private void processConnection(Socket clientSocket) {
        System.out.printf("[%s:%d] 客户端建立连接\n",clientSocket.getInetAddress().toString(),clientSocket.getPort());
        try (InputStream inputStream = clientSocket.getInputStream()){
            try (OutputStream outputStream = clientSocket.getOutputStream()){
                Scanner sc = new Scanner(inputStream);
                while (true){
                    if(!sc.hasNext()){
                        System.out.printf("[%s:%d] 客户端断开连接\n",clientSocket.getInetAddress().toString(),clientSocket.getPort());
                        break;
                    }
                    String request = sc.next();
                    String response = process(request);
                    PrintWriter printWriter= new PrintWriter(outputStream);
                    printWriter.println(response);
                    printWriter.flush();

                    System.out.printf("[%s:%d] request:%s response:%s\n",
                            clientSocket.getInetAddress(),
                            clientSocket.getPort(),
                            request,
                            response);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public String process(String request) {
        return  request;
    }

    public static void main(String[] args) throws IOException {
        TcpThreadPool pool = new TcpThreadPool(9090);
        pool.start();
    }
}
